Quick-acting safety abutment



Dec. 3, 1929.

A. E. WEINGARTNER 1,738,409

QUICK ACTING SAFETY ABUTMENT Filed June 4, 1924 2 Sheets-Sheet 2 Q/ j Q5 invention Patented Dec. 3, 1929 11N ITED STATES `AN'rnoNYn. WErNGAnrNER, 0F BETnnnHEi/r, PENNSYLVANIA, AsusrGNon fro Alunni- CAN ENGINEERING oo'ivrrANY, jor PHILADELPHIA, PENNSYLVANIA, "A oonroaA- "frroN or :PnNNsYLvANIA Application filed. June 4, 1924. Serial No. 717,908.

My invention relates to devices applicable to mechanically moving parts, which arexsubject tovariable stroke, and it is an important `object of my inventionto provide such form of device which is particularly adapted vto effect quick and "easy adjust-ments of considerable length. Such` desired results are `not characteristic ofthe .usual formof stroke adjusting means :involving the use of a nut on y a threaded shaft.`

Another object Voi" `my invention is the provision of a safety abutment7 the resisting force `of `which is bcarriedby` `replaceable locking elements `under shear.

i A .further Object of, my invention is to ,provide .an abutment lrvhioh o embodies safety means permittingfa yieldingin the event of excessive loads. l

.,practicecl, willbefapplarent more fully hereinraftenwhen taln `in connection with the accompanying ldescription, claims and "drawvFig. 1 is a verticalsectional view of the front end y 'of `an inclinedV undered stoker o embodying ,my invention;

Fig. 2 is a horizontal sectional view of the quick-.acting safetyl abutment .embodying my i Fig. 3 is a transverse sectional View taken on` the line III-elliot `{.Fig. 2;and

Fig. is a view snnilartoliig.. 3 taken on 'the une Iv-iv of rig. 2.

In order to illustrate i more `completely and fully the. application ot` my invention as well `as the details `of construction and operation ther-coil have shown the saine as appliedfto an automaticstoher `1 jef theunderfeed type having adjustable-stroke pusher `mechanism u 2. The stoker 1 may` comprise a plurality of series of inclined tuyres 3, each series of which extendfrom a fuelopening 4 in a furnace front wall 5. A plurality of series `of retorts 6, alternating `with the series :of tuyres `3are providedwith a common inclined base section Y comprising a plurality of pushersfS.

rial. to be burned, say green. coal, from a hopper 9 which opens into a cylinder 11 having an operative connection with lthe stoler inlet openingi in the iront wall 5 of the furnace. The continuous passage of the green coal from thehenpert) in through the furnace opening 4 and c own into the retorts 6 may be eliectcd by means ot a piston 12 which is slidably mounted inthe cylinder 11. The piston 12 maybe reciprocatedby meansot' power apparatus 13 `forming no part ofthe present invention.

`The green coal may be intermittently moved out of the `retorts `intofthe tuyres by reciprocatingythe.inclinedlioor section `.of the several retorts f6 through the pusher mechanism 2. The latter includes an operatingmember,one part of which comprises .a pusher rodlll` which has an inner end Isecured to the movable door section 7 and `an outer endslidably mounted 1n adeg pending shoulder portion 15 of the cylinder 11. The outer end .off the pusher rod Jflis provided with ,a threaded `boring Afor the l. reception oa," threaded end portion ofvan en tensionrod ,17 constituting"another part of theoperating member. 4The rod 17 'is offre duced diameterwith respect-to the ypusher rod `or member 14 to provide a `SlfiOulder 18.

Thepiston12 is `provided witha de pending shoulder 19it'orming adriving mem er", the shoulder being perforated toreceive slidably the extensioniod "17. Qn the outer end portion of the extension rod 17, ismounted an adjustable headfor `abutment 21 embodying my .present invention. The abutment or block 21 is designed Ato change quiehly and easily the stroke eilt-he pusher rod "14: from a maximum value, when the abutment 2l is positioned :immediately fadjacentto the cylinder shoulder "portion ,15, to a l minimum value, when the abutment 21 is positioned near the outeriend of the extensionrod 17, thereby effecting `corresponding` changes in thefstrole" of the several lpushers `8 `'constitiiting the inclined iioor 7,

Referring more particularly to Figs. 2,3 `and 4; which are enlarged detail kviews of the safety abutment 21 shown in Fig.. '15 a body member 22, which maybe oic block-like` tornn is provided with-an axial perforation 23 of such-dimensions as to receive loosely the extension rod 17. -The body or collar member Vv22 may be provided with a plurality of spaced horizontal pins or'locking elements 24 which are positioned adjacent to one side of the perforation 23 so as to extend laterally l thereof. An adjacent side 25 of the exten- `sion rodm17is provided Vwith a plurality of slots or recesses 26 which are adapted to receive'the pins 24, as shown, for instance, in

surface formed bythe several slots 26 extends over such portion of the rearside of the ex- Y the interlocking recesses 26 and tensionv member 17v as is necessary to provide for the desired range of stroke. The pins 24 Amaybe rigidlysecured inl engagement with the recesses 26 adjacent to the desired axial position vofthe abutment 21 by clamping means 27 which has been shown in the form of.' av set-screw'ihaving an, end 28 thereof adapted to engage a side'29 of the extension member 17 opposite to the side 25 carrying the several slots 26.

jWhenfit is desired to. change the 'stroke of the pusher rod 14,the set-screwv 27 is moved an amount sufficient to allow the pins 24 to be disengaged from the recesses 26, where- Vupon'the/abutment 21 may be quickly moved vover the notched extensionrod 17 to the position giving the desired stroke, 'the subsequent tightening of the set-screw 27 causing j pins 24 to be rigidly secured together.

e Attention is directed to the fact that when fthe abutment 21'is in the locked position shown-,inthe drawings, the resisting force thereof is carried bythe* several pins 24 under shear. Since the pins or shearable elementsY 24 maybe made of reliable material, as, for instance, rolled steel, the safe 'load on the abutment 21 may be greatly increased.

A' furtherl advantage resulting from the luse of the pins 24 resides in' the fact that they may be utilized as safetymeans, permitting the yielding of the abutment 21 under excessive lstrains.

Should it beV desirable to limit the maxifmuinmovement of the abutment 21 toward the cylinder shoulder portion 15, and hence thestrokeof the pusher'rod 14, an end abutment lrmay be positioned in axial alignment with the extension rod 17 so as'to eny gage the outer` endof the rod 17 when the 6o abutment A21 hasbeen moved inwardly the desiredamount. The end abutment 31 may be"illust'ra'tedas Ean 'end portion 32 of a strap 33 oppositefsides 34y and 35 of which are secured to the main body 22.

' `While I have described certain forms of embodiment of my 4invention in detail and while I have pointed out certain of the most obvious applications thereof, I do not intend that the language employed in the following claims shall be limited to the precise features described, but I intend that the claims shall be construed to cover all combinations which are fairly included in the language thereof when read in connection with the prior art regardless of the details and functions mentioned in the description or illustrated in the drawing.

I claim:

' l. In'y combination, means having a racklilre surface, an abutment for said means, and safety means for operatively associating said abutment and said'means including a plurality of shearable pins carried by said abutment and adapted to cooperate with said rack-like surface.

2. In a Stoker, a rod having an adjustable head, and a safety pin for operatively associating said rod and said head in such manner that said pin carries the thrust incident to the operation of saidrrod and head, said rod having a rack-like surface in operative relation to said pin.

3. In combination, a rod provided with a rack-like surface, a block constituting an abutment mounted on said rod and provided with safety means for engaging said racklike surface, said surface and said means being disengageable and clamping means for securing said safety means in engagement with said surface.

4. An abutment comprising la body provided with a longitudinally extending perforation, at least one locking pin positioned in said perforation substantially transversely thereof, clamping means also extending into said perforation, and an end abutment spaced from said perforation but in axial alignment therewith and carried by said body.

5. Means provided with a recess, a separate head for said means, a pin mounted on said head, said pin being positioned in said recess so that substantially one-half of the circumference thereof is engaged by said means, and an abutment spaced from said pin.

6. A body member having a recess, an operating member movable in said recess, and having a rack-like surface, a plurality of shearable locking elements extending' from said body member into said recess, and clamping means carried by one of said members also extending into said recess, whereby the said rack-like surface of said operating member may be held against said locking elements.

7. In combination, pusher means for Stoker apparatus provided with a plurality of slots forming a rack-like surface, and an abutment for said pusher means loosely mounted thereon, said abutment being provided with a plurality of safety pins spaced driving member in operative relation to said abutment, and means including a plurality of locking elements for operatively associating said abutment and said operating memn ber whereby a relative movement therebe u tween may occur when the load on said abutment exceeds a desired value.

ANTHONY E. WVEINGARTNER. 

